package com.xulinhao.web;/**
 * @author xulinhao
 * @create 2021-05-28 21:48
 */

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Method;

/**
 * @Author xlh
 * @packagename: com.xulinhao.web
 * @classname: BaseServlet
 * @Description:
 * @Date 2021/5/28
 */
public abstract class BaseServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        解决Post请求中文乱码问题
        req.setCharacterEncoding("UTF-8");
//        解决响应的中文乱码
        resp.setContentType("text/html;charset=UTF-8");
        String action = req.getParameter("action");

        try {
            //获取 action 业务鉴别字符串，获取相应的业务方法反射对象
            Method method = this.getClass().getDeclaredMethod(action,HttpServletRequest.class,HttpServletResponse.class);
            //System.out.println(method);
            // 调用目标业务方法
            method.invoke(this, req, resp);
        }catch (Exception e) {
            e.printStackTrace();
            //把异常抛给Filter过滤器
            throw new RuntimeException(e);
        }
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

}
